// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
#define CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_

#include <stdint.h>

#include "base/macros.h"
#include "content/common/content_export.h"
#include "content/public/common/resource_type.h"
#include "net/url_request/url_request_interceptor.h"

class GURL;

namespace net {
class URLRequest;
}

namespace content {
class AppCacheHost;
class AppCacheRequestHandler;
class AppCacheServiceImpl;
class ResourceRequesterInfo;

// An interceptor to hijack requests and potentially service them out of
// the appcache.
class CONTENT_EXPORT AppCacheInterceptor : public net::URLRequestInterceptor {
public:
    // Must be called to make a request eligible for retrieval from an appcache.
    static void SetExtraRequestInfo(net::URLRequest* request,
        AppCacheServiceImpl* service,
        int process_id,
        int host_id,
        ResourceType resource_type,
        bool should_reset_appcache);

    // PlzNavigate
    // Must be called to make a request eligible for retrieval from an appcache.
    static void SetExtraRequestInfoForHost(net::URLRequest* request,
        AppCacheHost* host,
        ResourceType resource_type,
        bool should_reset_appcache);

    // May be called after response headers are complete to retrieve extra
    // info about the response.
    static void GetExtraResponseInfo(net::URLRequest* request,
        int64_t* cache_id,
        GURL* manifest_url);

    // Methods to support cross site navigations.
    static void PrepareForCrossSiteTransfer(net::URLRequest* request,
        int old_process_id);
    static void CompleteCrossSiteTransfer(net::URLRequest* request,
        int new_process_id,
        int new_host_id,
        ResourceRequesterInfo* requester_info);
    static void MaybeCompleteCrossSiteTransferInOldProcess(
        net::URLRequest* request,
        int old_process_id);

    AppCacheInterceptor();
    ~AppCacheInterceptor() override;

protected:
    // Override from net::URLRequestInterceptor:
    net::URLRequestJob* MaybeInterceptRequest(
        net::URLRequest* request,
        net::NetworkDelegate* network_delegate) const override;
    net::URLRequestJob* MaybeInterceptResponse(
        net::URLRequest* request,
        net::NetworkDelegate* network_delegate) const override;
    net::URLRequestJob* MaybeInterceptRedirect(
        net::URLRequest* request,
        net::NetworkDelegate* network_delegate,
        const GURL& location) const override;

private:
    static void SetHandler(net::URLRequest* request,
        AppCacheRequestHandler* handler);
    static AppCacheRequestHandler* GetHandler(net::URLRequest* request);

    DISALLOW_COPY_AND_ASSIGN(AppCacheInterceptor);
};

} // namespace content

#endif // CONTENT_BROWSER_APPCACHE_APPCACHE_INTERCEPTOR_H_
